SU529044A1 - Lunette to guide gun drills - Google Patents

Description

one

The invention relates to the processing of metals.

cutting and can be used npjr drilling

1 deep holes with rifle drill bits with internal coolant outlet

(Coolant) and chips.

Known punet for the direction of gun drills, bulging in the form of rotating rollers moving in the direction perpendicular to the axis of the drill, and fixed rollers having a drill profile.

However, these lunettes are not BOcnpiao№taroT axial force arising on the drill during drilling, which, when machining deep holes, leads to buckling of the drill. To eliminate the longitudinal swing of the drill, several lunettes are installed, and the length of the bed of specially-drilled machines increases by the amount required to move the headstock with the clamp on it with the drill shank.

The aim of the invention is to increase the longitudinal stability of the drill stem and reduce the machine dimensions.

To do this, in the proposed lunette, a rack and pinion is mounted on the stem of the drill, and a fixed

: the roller is made in the form of scissors and is connected to the drive of workers and accelerated drill feeds.

Connecting one (or several) rollers of the proposed lunet with a drill feed drive allows you to perceive not only the torque, but also the axial cutting force in the immediate vicinity of the treatment area, which increases the longitudinal stability, drills and significantly reduces the machine bed.

FIG. 1 shows the rest, general view;

in fig. 2-cross-section of the steady on.

The lunette is fulfilled in the form of three; the rollers 1-3, mounted on axles 4-6. Naru osh surface of rollers 2 and 3 is made by removing the coolant grooves in the cutting zone of the gun drill 7, while jOHH rotates on axles 5 and 6, which are located in the swing; Ke 8 mounted on the movable plunger 9. 1, for example, sprue | zhina 10. To provide a drill 7, roller 1 is made in the form of scissors and connected to a rotational drive, for example, to a drive of working and accelerated feeds (not shown).

The stem of the drill bit 7 is made in the form of a toothed rack, which engages with the role

room 1. All details of the steady are mounted in the housing 11 located on the bed in the immediate vicinity of the workpiece 12.

When installing the gun drill 7, the roller rollers 2 and 3, using, for example, an eccentric shaft or other mechanism, acting only on the plunger 9, move away from the upper roller 1, a distance sufficient to insert the drill between them. After the insertion of the drill 7, the plunger 9 is released, and the spring 0 presses the drill with the rollers 2 and 3 to the roller 1, while the drill 7 is bolted onto the curved surface of the rollers 2 and 3.

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Claims (1)

Invention Formula A lunette for guiding gun drills, comprising a housing and rotatably mounted movable in a direction perpendicular to the axis of the drill and stationary rollers, characterized in that, in order to increase the longitudinal stability of the drill stalks and decrease; neither the dimensions of the machine, a rack mounted on the stem, and a fixed roller made in the form of a gear and connected to a rotational drive, for example, a drill feed drive.